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vagabundo [1.1K]
3 years ago
5

Why would i use quadratic formula to solve this quadratic equation?

Mathematics
1 answer:
lina2011 [118]3 years ago
6 0

Answer:

It would be difficult to factor it...

Step-by-step explanation:

I'm not sure factoring would work so the quadratic formula would be the only way

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Solve the system using the elimination method.
spayn [35]

Answer:

  (x, y, z) = (-22/13, 29/13, 6/13)

Step-by-step explanation:

Adding the first and second equations, we get ...

  (3x +2y -3z) +(7x -2y +5z) = (-2) +(-14)

  10x +2z = -16 . . . . collect terms

  5x + z = -8 . . . . . . divide by 2 . . . [eq4]

Adding twice the second equation to the third, we get ...

  2(7x -2y +5z) +(2x +4y +z) = 2(-14) +(6)

  16x +11z = -22 . . . . . . [eq5]

Now, we have two equations with the variable y eliminated. We can subtract [eq5] from 11 times [eq4] to eliminate z:

  11(5x +z) -(16x +11z) = 11(-8) -(-22)

  39x = -66

  x = -66/39 = -22/13

From [eq4], we can find z as ...

  z = -8 -5x = -8 -5(-22/13) = 6/13

And from the second equation, we get ...

  y = (1/2)(7x +5z +14) = (1/2)(7(-22/13) +5(6/13) +14) = 29/13

The solution is (x, y, z) = (-22/13, 29/13, 6/13).

6 0
3 years ago
One number exceeds another by 44. the sum of the numbers is 24. what are the​ numbers?
baherus [9]

Let, the numbers = x,y

x+y= 24   1st eqn

x-y = 44   2nd eqn

24-y-y = 44

-2y = 44-24

y = 20/-2 = -10

substitute that in equation 1st x = 24+10 = 34

so, the numbers would be 34 & -10



4 0
3 years ago
Select all that apply.
jeka94
The answers are It is a quadrilateral and Both pairs of opposite sides are parallel.

Hope this helps.
5 0
3 years ago
Read 2 more answers
PLEASE HELP!! <br> Let g(x) = -5x + 2 I’m confused
lina2011 [118]

Answer:

7

Step-by-step explanation:

We need to plug in -1 for x. Here's what we get:

-5(-1)+2     multiplying two negative numbers gives us a positive number

5+2

= 7

4 0
3 years ago
Read 2 more answers
Please Help!! 10 Points! Brainliest Answer
Ivenika [448]
The correct answer is D because you already have one side and one angle that are equal so you need one more side
6 0
3 years ago
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